我有一个表单,我希望在select change事件上更改文本字段的值,我想调用select字段的onchange事件来调用从数据库获取值的javascript函数,但它不起作用,需要根据这种情况可行的例子(我不熟悉AJAX / JSON / JSTL等,所以我没有使用它们)。
(NEED WORKABLE EXAMPLE)
-----------------------------
Name | | (Select Field)
-----------------------------
-----------------------------
Price | | (Text Field)
-----------------------------
-----------------------------
Image | |
| |
| |
| |
| |
-----------------------------
<script>
function updateFields()
{
<% ProductDAO yy = new ProductDAO();
String q = request.getParameter("orproductname");
String f = yy.getProductPrice(q);
request.setAttribute("price", f);
%>
document.getElementById("orproprice").value = f;
}
</script>
<form name="product" method="post" action=".\GetProducts">
<div class= "form">
<div class="input-group margin-bottom-sm">
<span class="input-group-addon">
<i class="fa fa-bars"></i>
</span>
<select class="form-control" name="orproductname" id="orproname" onchange="document.product.submit();">
<% ProductDAO pdr = new ProductDAO(); String[] kl = pdr.getProductNames();
for(int i=0;i<kl.length;i++) {%>
<option><% out.println(kl[i]); %></option>
<% } %>
</select>
</div>
<div class="input-group margin-bottom-sm">
<span class="input-group-addon">
<i class="fa fa-bars"></i>
</span>
<input class="form-control" type="text" placeholder="Original Price" id="orproprice" name="orproductprice" required>
</div>
<div class="input-group margin-bottom-sm">
<span class="input-group-addon">
<i class="fa fa-picture-o"></i>
</span>
<img class="img-responsive" src="img/game-2.jpg" alt="Product" >
</div>
<input class="btn btn-primary send" style="width:200px; margin-right:20px" type="submit" value="Order">
<input class="btn btn-primary send" style="width:200px" type="reset" value="Clear">
</form>
</div>
</div>
答案 0 :(得分:0)
向.\GetProducts
发送POST AJAX请求。请参阅AJAX的jQuery文档:http://api.jquery.com/jquery.ajax/。例如:
$.ajax({
method: "POST",
url: "/GetProducrs",
data: { formField: value, ... }
}).done(function( data ) {
//process data
});